SQL Formatter

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What this tool does

This tool reformats a SQL query for readability: consistent indentation, one clause per line, and your choice of keyword capitalization, across more than a dozen SQL dialects including MySQL, PostgreSQL, SQLite, T-SQL, PL/SQL, BigQuery, and Snowflake.

How It Works

Your SQL is parsed into a syntax tree using the grammar of the dialect you select, the same way a real database driver would need to understand the query's clauses, expressions, and nesting. That tree is then printed back out as text using consistent rules: one top-level clause (SELECT, FROM, WHERE, and so on) per line, nested expressions and subqueries indented one level deeper than their parent, and every keyword rewritten in the case you chose (uppercase, lowercase, or left exactly as typed). Because the output comes from re-printing the parsed structure rather than editing the original text, the result is always a complete, valid representation of the same query.

Problems it solves

• Turning a dense, single-line query (common in exported logs or minified application code) back into something readable.
• Keeping a consistent SQL style across a team or codebase without manually reformatting every query.
• Spotting a genuine syntax error early, since the parser will reject a query that would also fail against a real database.
• Reviewing a long query with many joins and subqueries more easily once it is properly indented.

Frequently asked questions